ULNRC-05960, Ameren Missouri - Spent Fuel Pool Instrumentation Integrated Plan

Ameren Missouri - Spent Fuel Pool Instrumentation Integrated Plan

ML13063A454
Person / Time
Site:	Callaway
Issue date:	02/18/2013
From:	Allammar M, Drudy M Westinghouse
To:	Pawlak P Office of Nuclear Reactor Regulation, - No Known Affiliation
Shared Package
ML130630581	List: ML13063A449 ULNRC-05960, Ameren Missouri - Spent Fuel Pool Instrumentation Integrated Plan
References
EA-12-051, LTR-PFPS-13-3, Rev. 0, ULNRC-05960
Download: ML13063A454 (11)

Text

Westinghouse Non-Proprietary Class 3

© 2013 Westinghouse Electric Company LLC All Rights Reserved

• Electronically approved records are authenticated in the Electronic Document Management System.

To: Paula Pawlak Date: February 18, 2013 cc: Debbie Kelly From: Post-Fukushima Products & Services Your Ref: LTR-PFPS-13-3 Tel: 412-374-2304 Revision 0

Subject:

Ameren Missouri Spent Fuel Pool Instrumentation Integrated Plan

Reference:

1. EA-12-051, Issuance of Order to Modify Licenses with Regard to Reliable Spent Fuel Pool Instrumentation, March 12, 2012.

Westinghouse has been contracted by Ameren Missouri to draft the Spent Fuel Pool (SFP) instrumentation integrated plan in response to the Nuclear Regulatory Commission (NRC) Order EA-12-051 (Reference 1). contains the SFP instrumentation integrated plan for Ameren Missouri to support their submittal to the NRC by February 28, 2013.

The integrated plan was prepared utilizing industry feedback and lessons learned from the Nuclear Energy Institute (NEI) meeting attended by Westinghouse on January 15, 2013, STARS feedback from the February 6, 2013 benchmark meeting, and feedback provided by Ameren Missouri.

Any questions can be directed to Mike Drudy at drudymp@westinghouse.com or 412-374-2304.

Author: Mike Drudy*

Author: Monzer Allam*

Post-Fukushima Products & Services Plant Engineering, US Verifier: Dennis Skeers*

Verifier: Jason Beasley*

Process Instrumentation Electrical and I&C Verifier: Jim Smith*

Plant Licensing Manager: Stephanie Harsche*

Post-Fukushima Products & Services Attachments: - Callaway Unit 1 Integrated Plan for Reliable Spent Fuel Pool Instrumentation Enclosure to ULNRC-05960 Page 1 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page1of10 Revision0 CallawayUnit1IntegratedPlanfor ReliableSpentFuelPoolInstrumentation I.

Introduction TheNuclearRegulatoryCommission(NRC)issuedOrderEA12051,IssuanceofOrderto ModifyLicenseswithRegardtoReliableSpentFuelPoolInstrumentation,(Reference1)dated March12,2012.TheOrderrequireslicensestohaveareliableindicationofthewaterlevelin associatedspentfuelstoragepoolscapableofsupportingidentificationofthefollowingpool waterlevelconditionsbytrainedpersonnel:(1)levelthatisadequatetosupportoperationof thenormalfuelpoolcoolingsystem,(2)levelthatisadequatetoprovidesubstantialradiation shieldingforapersonstandingonthespentfuelpooloperatingdeck,and(3)levelwherefuel remainscoveredandactionstoimplementmakeupwateradditionshouldnolongerbe deferred.TheOrderalsorequiressubmissionofanoverallintegratedplanthatprovidesa descriptionofhowtherequirementsoftheOrderwillbeachieved.

NuclearEnergyInstitute(NEI)1202,IndustryGuidanceforCompliancewithNRCOrder EA12051,ToModifyLicenseswithRegardtoReliableSpentFuelPoolInstrumentation, (Reference2)providesanapproachforcomplyingwithorderEA12051.NRCInterimStaff Guidance(ISG)JLDISG201203,CompliancewithOrderEA12051,ReliableSpentFuelPool Instrumentation,(Reference3)considersthatthemethodologiesandguidancein conformancewiththeguidelinesprovidedinReference2,subjecttotheclarificationsand exceptionsspecifictoReference2,Section3.4,Qualification,areanacceptablemeansof meetingtherequirementsofReference1.

ThisintegratedplanappliestoCallawayEnergyCenterUnit1(hereafterreferredtoas Callaway)andprovidestheapproachforcomplyingwithReference1usingthemethods describedinReference3.ConsistentwiththerequirementsofReference1andtheguidancein Reference2,sixmonthreportswilldelineateprogressmade,anyproposedchangesin compliancemethods,updatestotheschedule,andifneeded,requestsforreliefandbasis.

Enclosure to ULNRC-05960 Page 2 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page2of10 Revision0 II.

Schedule Installationofreliablespentfuelpool(SFP)levelinstrumentationwillbecompletedpriorto startupfromthesecondrefuelingoutage,aftersubmittalofthisplan,orDecember31,2016, whicheveroccursfirst,consistentwithCallawayPlantUnit1InitialStatusReportinResponseto March12,2012CommissionOrderModifyingLicenseswithRegardtoReliableSpentFuelPool Instrumentation(Reference4).

Thefollowingmilestonescheduleisprovided.Thedatesareplanningdatesandaresubjectto changeasdesignandimplementationdetailsaredeveloped.Anychangestothefollowing milestoneswillbereflectedinthesubsequentsixmonthstatusreports.

Thecurrentmilestonesare:

CommenceEngineeringandDesign 1Q2013 CompleteDesign 4Q2013 ReceiptofSFPInstruments 2Q2014 CompleteSFPInstrumentationProcedures&Training 3Q2014 SFPInstrumentsOperational 4Q2014 III.

IdentificationofSpentFuelPoolWaterLevels Keyspentfuelpoolwaterlevels:

1. Leveladequatetosupportoperationofthenormalfuelpoolcoolingsystem-Indicatedleveloneithertheprimaryorbackupinstrumentchannelof24feet10.75 inchesabovethetopofthefuelstorageracksplustheaccuracyoftheSFPlevel instrumentchannel,whichistobedetermined.ThisalignswiththenormalSFPlevelas showninCallawayFinalSafetyAnalysisReport(FSAR)Figure1.221(Reference5)and providesadequatemargintomaintainfuelpoolcoolingpumpsuction.

2. Leveladequatetoprovidesubstantialradiationshieldingforapersonstandingonthe spentfuelpooloperatingdeck-Indicatedleveloneithertheprimaryorbackup instrumentchannelofgreaterthan10feet(+/1foot)abovethetopofthefuelstorage racksbasedonReference2andReference3.Thismonitoringlevelensuresthereisan adequatewaterleveltoprovidesubstantialradiationshieldingforapersonstandingon thespentfuelpooloperatingdeck.

3. LevelwherefuelremainscoveredIndicatedleveloneithertheprimaryorbackup instrumentchannelofgreaterthan1footabovethetopofthefuelstorageracksplus theaccuracyoftheSFPlevelinstrumentchannel,whichistobedetermined.This Enclosure to ULNRC-05960 Page 3 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page3of10 Revision0 monitoringlevelassuresthatthereisadequatewaterlevelabovethestoredfuelseated intherack.

IV.

Instruments ThedesignoftheinstrumentswillbeconsistentwiththeguidelinesofReference2and Reference3asdiscussedbelow.

PrimaryandBackupInstrumentChannels:

TheCallawaySFPInstrumentationSystem(SFPIS)willutilizefixedprimaryandbackupguided waveradar(GWR)sensors.TheGWRtechnologymeetstherequirementsofReference1and Reference3byprovidingthecapabilitytoreliablymonitortheSFPwaterlevelunderadverse environmentalconditions.

GWRtechnologyusestheprincipleoftimedomainreflectometrytodetecttheSFPwaterlevel.

Amicrowavesignalissentdownthecableprobesensor,andwhenitreachesthewater,itis reflectedbacktothesensorelectronics.Thisisduetothedifferencebetweenthedielectric constantsofairandwater.Usingthetotalsignaltraveltime,thesensorelectronicsembedded firmwarecomputesthelevelofthewaterintheSFP.Theprobe,whichislocatedintheSFP,is separatedfromthesensorelectronics,andconnectedbyaninterconnectingcablethatis routedintoanadjacentbuilding.ByplacingthesensorelectronicsoutsideoftheSFPareaitis notsubjecttotheharshenvironmentresultingfromtheboilingorlossofwaterinthepool duringapostulatedlossofinventoryeventthatcreateshighhumidity,steamand/orradiation.

Theprimaryandbackupinstrumentchannelswillprovidecontinuouslevelindicationovera rangeof23feet10.75inches,from12inchesabovethetopofthefuelstorageracks(plant elevation2,022feet1.25inches)tothenormalpoollevelelevation(plantelevation2,046feet) asshownintheCallawayFSARFigure1.221(Reference5).

V.

Reliability Reliabilityoftheprimaryandbackupinstrumentchannelswillbeassuredbyconformancewith theguidelinesofReference3andReference2,Section3.4,Qualification,andSection4.3, TestingandCalibration.

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WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page4of10 Revision0 VI.

InstrumentChannelDesignCriteria:

InstrumentchanneldesigncriteriawillmeettheguidelinesofReference2andReference3.

Theprimaryandbackupmeasurementsystemswillconsistofaflexiblestainlesssteelsensor cableprobe,suspendedintheSFPfromabracketattachedtotheoperatingdeckortoaraised curbatthesideofthepool.Thecableprobewillextendfromslightlyabovethenormalpool levelelevationtolessthan1footabovethetopofthefuelstorageracks.Thesensor electronicswillbemountedinanadjacentbuilding,topreventinstrumentexposureto radiationandhightemperatureswhichcouldresultfromapostulatedlossofwaterinventoryin thepool.Therearealsotwomountedpanels,providingsensoranddisplayinterfacesand wirelesstransmissionandreceptioncapabilities.

The420milliamp(mA)signalfromthesensorelectronicsmoduleisconnectedtoa mounted,seismicallyqualifiedpowersupplyandtransmitterpanel.Thepanelcontainsa24 volt(V)directcurrent(dc)(Vdc)uninterruptiblepowersupply(UPS),awirelesstransmitterfor thesensorsignal,andbatteriesforcontinuedsystemoperationduringalossofalternating current(ac)powerforaminimumof72hours,inwhichtimeanalternateexternalsourceof powercanbesupplied.Abulkheadconnectorandtransferswitchisexternallyaccessiblefor theconnectionofanalternatepowersource.Thepanelislocatedwithornearthesensor electronicshousing,outsideofthespentfuelpoolarea.Theinterfacebetweenthesensor electronicsandthemountedpanelisatwisted,shieldedpaircable.

Thetransmitterpanelwillsendasignaltothewirelessreceiverpanel.Themountedseismically qualifiedwirelessreceiverpanelcontainsa24VdcUPS,doormounteddigitaldisplayofSFP level,andbatteriesforcontinuedsystemoperationduringalossofacpoweruntilanalternate externalsourceofpowercanbesupplied.Abulkheadconnectorandtransferswitchis externallyaccessiblefortheconnectionofanalternatepowersource.Themountedreceiver panelislocatedinoneoftheaccessiblelocationsinthevicinityofthecontrolroom.

VII.

Arrangement Theprimaryandbackupinstrumentsensingcomponentswillbeseparatedconsistentwiththe guidelinesofReference2andReference3.Designofthemountingbracketwillallowthefuel handlingmachinetopassoveritwithoutinterference.

ASFPwalkdownidentifiedpreliminarylocationsfortheprimaryandbackuplevelsensing components.Thepreliminarylocationsoftheprimaryandbackupinstrumentsensing componentsareattheplantnortheastandnorthwestcornersoftheSFP.Thedesignfor Enclosure to ULNRC-05960 Page 5 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page5of10 Revision0 installationwillincludephysicalseparationofthetwosensors,separateextensioncablesfrom theelectronicstothesensors,routingallcablesinseparateconduit/trays,separateUPSpower suppliedfromdifferentacsources,andseismicallyqualifiedmountingwithphysicalseparation ofboththelevelsensingelectronicsandindications.

Thefinallocationoftheprimaryandbackupsystemmountingbracketswillbedetermined duringthedesignphasewithconsiderationofpoweravailabilityandseparationrequirements toprotectagainstmissiles.

Thelevelsensingelectronicsforbothprimaryandbackupsystemswillbelocatedinthe auxiliarybuilding,compliantwithReference2andReference3forseparationandaccessibility.

Theprimarysystemindicatorwillbelocatedinthevicinityofthecontrolroom.Thebackup systemindicatorwillbelocatedinanaccessiblelocation.Thelocationswillallowforreadingof theindicatorsfollowinganevent.

VIII.

Mounting Themountingofboththeprimaryandbackupsystemwillbeinstalledtomaintainitsintegrity duringandfollowingadesignbasisseismicevent.Alllocationswillbereviewedfor twooveroneseismicinterference.

IX.

Qualification Reliabilityofbothinstrumentchannelswillbedemonstratedviaanappropriatecombinationof design,analyses,operatingexperience,and/ortestingofchannelcomponentsforthefollowing setsofparameters:

(1) conditionsintheareaofinstrumentchannelcomponentusedforallinstrument components, (2) effectsofshockandvibrationoninstrumentchannelcomponentsusedduringand followinganyapplicableeventforinstalledcomponents,and (3) seismiceffectsoninstrumentchannelcomponentsusedduringandfollowinga potentialseismiceventforonlyinstalledcomponents.

Thenormaloperational,event,andposteventconditionsfortemperature,humidity,and radiation,willbeaddressedfornofewerthansevendaysposteventoruntiloffsiteresources canbedeployedbythemitigatingstrategiesresultingfromtheNRCissuedOrderEA12049, IssuanceofOrdertoModifyLicenseswithRegardtoRequirementsforMitigationStrategiesfor Enclosure to ULNRC-05960 Page 6 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page6of10 Revision0 BeyondDesignBasisExternalEvents,datedMarch12,2012(Reference6).Examplesof postevent(beyonddesignbasis)conditionstobeconsideredare:

(1) radiologicalconditionsforanormalrefuelingquantityoffreshlydischarged(100hours) fuelwiththeSFPwaterlevel3(SectionIII,Item3)asdescribedinReference1, (2) temperaturesof212°Fand100percentrelativehumidityenvironment, (3) boilingwaterand/orsteamenvironment, (4) aconcentratedboratedwaterenvironment, (5) impactofFLEXmitigatingstrategies.

Theinstrumentchannelreliabilitywillbedemonstratedviaanappropriatecombinationof design,analyses,operatingexperience,and/ortestingofchannelcomponentsfortheeffectsof shockandvibration.Demonstrationofshockandvibrationadequacywillbeconsistentwith theguidelinesinReference2andReference3.

Demonstrationofseismicadequacywillbeachievedusingoneormoreofthefollowing methods:

(1) demonstrationofseismicmotionconsistentwiththatofexistingdesignbasisloadsat theinstalledlocation; (2) substantialhistoryofoperationalreliabilityinenvironmentswithsignificantvibration, suchasforportablehandhelddevicesortransportationapplications.Suchavibration designenvelopeshallbeinclusiveoftheeffectsofseismicmotionimpartedtothe componentsproposedatthelocationoftheproposedinstallation; (3) adequacyofseismicdesignandinstallationisdemonstratedbasedontheguidancein Sections7,8,9,and10ofIEEEStandard3442004,IEEERecommendedPracticefor SeismicQualificationofClass1EEquipmentforNuclearPowerGeneratingStations, (Reference7)orasubstantiallysimilarindustrialstandard; (4) demonstrationthatproposeddevicesaresubstantiallysimilarindesigntomodelsthat havebeenpreviouslytestedforseismiceffectsinexcessoftheplantdesignbasisatthe locationwheretheinstrumentistobeinstalled(glevelsandfrequencyranges);or (5) seismicqualificationusingseismicmotionconsistentwiththatofexistingdesignbasis loadingattheinstallationlocation.

Enclosure to ULNRC-05960 Page 7 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page7of10 Revision0 X.

Independence Thebackupinstrumentsystemwillberedundanttoandindependentoftheprimaryinstrument system.

Independenceofthetwosystemsincludes:location,mounting,powersources,powerand signalwiring,andindications,topreventanyfailureofonesystemfromaffectingtheother system.

XI.

PowerSupplies Anacsourcewillbeselectedforeachsystems24VdcUPS,withpowercablesrouted separatelythroughexistingornewtray/conduitandpenetrations.

Bothchannelswillbepoweredbyindependentbatteriesfollowingalossofacpower.The minimumbatterylifewillbe72hours.The72hourbatterylifeisasufficientamountoftime foranalternatesourceofpowertobeprovidedbytheplantspecificprocedurestoaddress Reference6.Eachchannelwillincludeanexternallyaccessiblebulkheadconnectorand transferswitchforconnectionofanalternatepowersource.

XII.

Accuracy Instrumentchannelswillbedesignedsuchthattheywillmaintaintheirspecifiedaccuracy withoutrecalibrationfollowingapowerinterruptionorchangeinpowersource.

TheaccuracywillbewithintheresolutionrequirementsofReference2,Figure1.

Theinstrumentaccuracywillbesufficienttoallowpersonnelusingplantproceduresto determinewhenthewaterlevelreacheslevels1,2,and3withoutconflictingorambiguous indication.

XIII.

Testing Instrumentchanneldesignwillprovideforroutinetestingandcalibrationconsistentwith Reference2andReference3.

Enclosure to ULNRC-05960 Page 8 of 11

WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page8of10 Revision0 XIV.

Display Theprimarysystemindicatorwillbelocatedinthevicinityofthecontrolroom.Thebackup systemindicatorwillbelocatedinanaccessiblelocation.Thelocationswillallowforreadingof theindicatorsfollowinganevent.ThedisplaywillprovidecontinuousindicationoftheSFP waterlevelandwillbeconsistentwiththeguidelinesofReference2andReference3.

XV.

InstrumentChannelProgramCriteria InstrumentchannelprogramcriteriawillbeconsistentwiththeguidelinesofReference2and Reference3.

A.

Training TheSystematicApproachtoTraining(SAT)willbeusedtoidentifythepopulationtobe trainedandtodetermineboththeinitialandcontinuingelementsoftherequired training.Trainingwillbecompletedpriortoplacingtheinstrumentationinservice.

B.

Procedures Procedureswillbedevelopedusingguidelinesandvendorinstructionstoaddressthe maintenance,operation,andabnormalresponseissuesassociatedwiththenewSFP instrumentation.

FLEXSupportGuidelineswilladdressastrategytoensuretheSFPwatermakeupis initiatedatanappropriatetimeconsistentwithimplementationofNEI1206,Diverse andFlexibleCopingStrategies(FLEX)ImplementationGuide,(Reference8).

C.

TestingandCalibration Processeswillbeestablishedandmaintainedforschedulingandimplementing necessarytestingandcalibrationoftheprimaryandbackupspentfuelpoollevel instrumentchannelstomaintaintheinstrumentchannelsatthedesignaccuracy.

Testingandcalibrationoftheinstrumentationwillbeconsistentwithvendor recommendationsandanyotherdocumentedbasis.

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WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page9of10 Revision0 XVI.

NeedforReliefandBasis AmerenMissouriisnotrequestingrelieffromtherequirementsofReference1ortheguidance inReference3atthistime.

ConsistentwiththerequirementsofReference1andtheguidanceinReference2,thesix monthreportswilldelineateprogressmade,anyproposedchangesinthecompliancemethods, updatestotheschedule,andifneeded,requestsforreliefandtheirbases.

XVII.

References

1) EA12051,IssuanceofOrdertoModifyLicenseswithRegardtoReliableSpentFuel PoolInstrumentation,March12,2012.

2) NEI1202,IndustryGuidanceforCompliancewithNRCOrderEA12051,ToModify LicenseswithRegardtoReliableSpentFuelPoolInstrumentation,Revision1, August2012.

3) NRCJLDISG201203,CompliancewithOrderEA12051,ReliableSpentFuelPool Instrumentation,Revision0,August29,2012.

4) AmerenMissouriLetterULNRC05925,DocketNumber50483,CallawayPlantUnit1, UnionElectricCo.,FacilityOperatingLicenseNPF30,InitialStatusReportinResponseto March12,2012CommissionOrderModifyingLicenseswithRegardtoReliableSpent FuelPoolInstrumentation(OrderNumberEA12051),October29,2012.

5) CallawayFinalSafetyAnalysisReport,RevisionOL19a,July2012.

6) EA12049,IssuanceofOrdertoModifyLicenseswithRegardtoRequirementsfor MitigationStrategiesforBeyondDesignBasisExternalEvents,March12,2012.

7) IEEEStandard3442004,IEEERecommendedPracticeforSeismicQualificationofClass 1EEquipmentforNuclearPowerGeneratingStations.

8) NEI1206,DiverseandFlexibleCopingStrategies(FLEX)ImplementationGuide, Revision0,August2012.

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WestinghouseNonProprietaryClass3 LTRPFPS133Attachment1 Page10of10 Revision0 XVIII.

Sketches

Sketch1 PreliminaryProbeLocationsforCallawayUnit1 XIX.

OpenItems Therearenoopenitems.

PlantNorth Enclosure to ULNRC-05960 Page 11 of 11